1 /* $NetBSD: intel_dsi.c,v 1.2 2021/12/18 23:45:30 riastradh Exp $ */ 2 3 // SPDX-License-Identifier: MIT 4 /* 5 * Copyright © 2018 Intel Corporation 6 */ 7 8 #include <sys/cdefs.h> 9 __KERNEL_RCSID(0, "$NetBSD: intel_dsi.c,v 1.2 2021/12/18 23:45:30 riastradh Exp $"); 10 11 #include <drm/drm_mipi_dsi.h> 12 #include "intel_dsi.h" 13 14 int intel_dsi_bitrate(const struct intel_dsi *intel_dsi) 15 { 16 int bpp = mipi_dsi_pixel_format_to_bpp(intel_dsi->pixel_format); 17 18 if (WARN_ON(bpp < 0)) 19 bpp = 16; 20 21 return intel_dsi->pclk * bpp / intel_dsi->lane_count; 22 } 23 24 int intel_dsi_tlpx_ns(const struct intel_dsi *intel_dsi) 25 { 26 switch (intel_dsi->escape_clk_div) { 27 default: 28 case 0: 29 return 50; 30 case 1: 31 return 100; 32 case 2: 33 return 200; 34 } 35 } 36 37 int intel_dsi_get_modes(struct drm_connector *connector) 38 { 39 struct intel_connector *intel_connector = to_intel_connector(connector); 40 struct drm_display_mode *mode; 41 42 DRM_DEBUG_KMS("\n"); 43 44 if (!intel_connector->panel.fixed_mode) { 45 DRM_DEBUG_KMS("no fixed mode\n"); 46 return 0; 47 } 48 49 mode = drm_mode_duplicate(connector->dev, 50 intel_connector->panel.fixed_mode); 51 if (!mode) { 52 DRM_DEBUG_KMS("drm_mode_duplicate failed\n"); 53 return 0; 54 } 55 56 drm_mode_probed_add(connector, mode); 57 return 1; 58 } 59 60 enum drm_mode_status intel_dsi_mode_valid(struct drm_connector *connector, 61 struct drm_display_mode *mode) 62 { 63 struct drm_i915_private *dev_priv = to_i915(connector->dev); 64 struct intel_connector *intel_connector = to_intel_connector(connector); 65 const struct drm_display_mode *fixed_mode = intel_connector->panel.fixed_mode; 66 int max_dotclk = to_i915(connector->dev)->max_dotclk_freq; 67 68 DRM_DEBUG_KMS("\n"); 69 70 if (mode->flags & DRM_MODE_FLAG_DBLSCAN) 71 return MODE_NO_DBLESCAN; 72 73 if (fixed_mode) { 74 if (mode->hdisplay > fixed_mode->hdisplay) 75 return MODE_PANEL; 76 if (mode->vdisplay > fixed_mode->vdisplay) 77 return MODE_PANEL; 78 if (fixed_mode->clock > max_dotclk) 79 return MODE_CLOCK_HIGH; 80 } 81 82 return intel_mode_valid_max_plane_size(dev_priv, mode); 83 } 84 85 struct intel_dsi_host *intel_dsi_host_init(struct intel_dsi *intel_dsi, 86 const struct mipi_dsi_host_ops *funcs, 87 enum port port) 88 { 89 struct intel_dsi_host *host; 90 struct mipi_dsi_device *device; 91 92 host = kzalloc(sizeof(*host), GFP_KERNEL); 93 if (!host) 94 return NULL; 95 96 host->base.ops = funcs; 97 host->intel_dsi = intel_dsi; 98 host->port = port; 99 100 /* 101 * We should call mipi_dsi_host_register(&host->base) here, but we don't 102 * have a host->dev, and we don't have OF stuff either. So just use the 103 * dsi framework as a library and hope for the best. Create the dsi 104 * devices by ourselves here too. Need to be careful though, because we 105 * don't initialize any of the driver model devices here. 106 */ 107 device = kzalloc(sizeof(*device), GFP_KERNEL); 108 if (!device) { 109 kfree(host); 110 return NULL; 111 } 112 113 device->host = &host->base; 114 host->device = device; 115 116 return host; 117 } 118 119 enum drm_panel_orientation 120 intel_dsi_get_panel_orientation(struct intel_connector *connector) 121 { 122 struct drm_i915_private *dev_priv = to_i915(connector->base.dev); 123 enum drm_panel_orientation orientation; 124 125 orientation = dev_priv->vbt.dsi.orientation; 126 if (orientation != DRM_MODE_PANEL_ORIENTATION_UNKNOWN) 127 return orientation; 128 129 orientation = dev_priv->vbt.orientation; 130 if (orientation != DRM_MODE_PANEL_ORIENTATION_UNKNOWN) 131 return orientation; 132 133 return DRM_MODE_PANEL_ORIENTATION_NORMAL; 134 } 135